Physics crossword puzzle

4. The _____ belt is a circumstellar disc in the outer Solar System, extending from the orbit of Neptune.
8. A fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms
9. Our planet is located in this galaxy?
10. Pounds per square inch.
11. the law of ____ of energy states that energy can be converted in form, but not created or destroyed.
13. A _____ machine doesn't have a motor, it's self powered.
14. Force due to gravity
16. In our solar system, it is the planet closest to the sun.
18. Newton's first law is the principle of ____.
19. Largest of Jupiter's moons.
20. The _____ System is the gravitationally bound system of the Sun and the objects that orbit it.

1. When antimatter and matter meet, they ______ each other.
2. My name is
3. Least amount of inputs to achieve the highest amount of output.
5. A measure of how fast something moves in a particular direction.
6. _____ energy ends up as heat.
7. _____ energy is stored up energy capable of doing work.
12. The ______ belt is located roughly between the orbits of the planets Jupiter and Mars.
15. Newton's ____ law all forces between two objects exist in equal magnitude and opposite direction.
17. My teacher calls himself